| article html file updated | 7 February 2020 06:01 CET | Update | https://www.mdpi.com/2227-7072/4/1/5 |
| article html file updated | 5 May 2019 21:12 CEST | Update | - |
| article html file updated | 26 March 2019 23:41 CET | Update | - |
| article html file updated | 29 March 2016 07:19 CEST | Original file | - |
| article xml uploaded. | 17 March 2016 08:30 CET | Original file | https://www.mdpi.com/2227-7072/4/1/5/xml |
| article pdf uploaded. | 17 March 2016 08:30 CET | Version of Record | https://www.mdpi.com/2227-7072/4/1/5/pdf |
